using System;
/*
 * $Id: PdfDeveloperExtension.cs 106 2009-12-07 12:23:50Z psoares33 $
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2009 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace iTextSharp.text.pdf {

    /**
    * Beginning with BaseVersion 1.7, the extensions dictionary lets developers
    * designate that a given document contains extensions to PDF. The presence
    * of the extension dictionary in a document indicates that it may contain
    * developer-specific PDF properties that extend a particular base version
    * of the PDF specification.
    * The extensions dictionary enables developers to identify their own extensions
    * relative to a base version of PDF. Additionally, the convention identifies
    * extension levels relative to that base version. The intent of this dictionary
    * is to enable developers of PDF-producing applications to identify company-specific
    * specifications (such as this one) that PDF-consuming applications use to
    * interpret the extensions.
    * @since   2.1.6
    */
    public class PdfDeveloperExtension {

        /** An instance of this class for Adobe 1.7 Extension level 3. */
        public static readonly PdfDeveloperExtension ADOBE_1_7_EXTENSIONLEVEL3 =
            new PdfDeveloperExtension(PdfName.ADBE, PdfWriter.PDF_VERSION_1_7, 3);
        
        /** The prefix used in the Extensions dictionary added to the Catalog. */
        protected PdfName prefix;
        /** The base version. */
        protected PdfName baseversion;
        /** The extension level within the baseversion. */
        protected int extensionLevel;
        
        /**
        * Creates a PdfDeveloperExtension object.
        * @param prefix    the prefix referring to the developer
        * @param baseversion   the number of the base version
        * @param extensionLevel    the extension level within the baseverion.
        */
        public PdfDeveloperExtension(PdfName prefix, PdfName baseversion, int extensionLevel) {
            this.prefix = prefix;
            this.baseversion = baseversion;
            this.extensionLevel = extensionLevel;
        }

        /**
        * Gets the prefix name.
        * @return  a PdfName
        */
        public PdfName Prefix {
            get {
                return prefix;
            }
        }

        /**
        * Gets the baseversion name.
        * @return  a PdfName
        */
        public PdfName Baseversion {
            get {
                return baseversion;
            }
        }

        /**
        * Gets the extension level within the baseversion.
        * @return  an integer
        */
        public int ExtensionLevel {
            get {
                return extensionLevel;
            }
        }
        
        /**
        * Generations the developer extension dictionary corresponding
        * with the prefix.
        * @return  a PdfDictionary
        */
        public PdfDictionary GetDeveloperExtensions() {
            PdfDictionary developerextensions = new PdfDictionary();
            developerextensions.Put(PdfName.BASEVERSION, baseversion);
            developerextensions.Put(PdfName.EXTENSIONLEVEL, new PdfNumber(extensionLevel));
            return developerextensions;
        }
    }
}
